Rebecca Rubin Film and Media Reporter Denzel Washington’s bloody assassin-thriller “The Equalizer 3” debuted at the top of box office charts with $34.5 million over the weekend and an estimated $41 million through Monday’s Labor Day holiday. It’s the second-biggest Labor Day opening weekend in modern times, though the holiday isn’t known for bringing people to the movies. After the record-holder Marvel’s 2021 blockbuster “Shang-Chi and the Legend of the Ten Rings” ($75 million for the three days, $94.6 million through Monday), the next highest-grossing Labor Day debut is Rob Zombie’s 2007 “Halloween” remake ($26 million for the three days, $30 million through Monday).